Lua: add cmsgpack scripting tests
Lua: add cmsgpack scripting tests

Basically: test to make sure we can load cmsgpack
and do some sanity checks to make sure pack/unpack works
properly.  We also have a bonus test for circular encoding
and decoding because I was curious how it worked.

adamweixuan/redis,janeasystems/redis,kolonse/redis,damy/redis,Cybermaxs/redis,alpha8/redis,janeasystems/redis,damy/redis,hanmichael/redis,alpha8/redis,upsoft/redis,jacklee0810/redis,enginekit/redis,adamweixuan/redis,quangnguyen90/redis,laurencee/redis,LittlePeng/redis,ScottKaiGu/redis,ideaar/redis,damy/redis,upsoft/redis,upsoft/redis,damy/redis,Jonavin/redis,sidsen/redis,ideaar/redis,jqk6/redis,adamweixuan/redis,adamweixuan/redis,quangnguyen90/redis,Jonavin/redis,kts12345/redis,jaambee/redis,upsoft/redis,jacklee0810/redis,jqk6/redis,kolonse/redis,miminus/redis,jaambee/redis,quangnguyen90/redis,kts12345/redis,Cybermaxs/redis,kts12345/redis,Jonavin/redis,kts12345/redis,shanegxxiao/redis,Jonavin/redis,jacklee0810/redis,shanegxxiao/redis,laurencee/redis,enginekit/redis,janeasystems/redis,jaambee/redis,miminus/redis,miminus/redis,miminus/redis,sidsen/redis,LittlePeng/redis,hanmichael/redis,Jonavin/redis,kolonse/redis,laurencee/redis,liqiang199105/redis,Cybermaxs/redis,sidsen/redis,ScottKaiGu/redis,ideaar/redis,liqiang199105/redis,jacklee0810/redis,alpha8/redis,liqiang199105/redis,ScottKaiGu/redis,miminus/redis,ScottKaiGu/redis,enginekit/redis,jaambee/redis,kolonse/redis,erwin00776/redis-2.8-optimize,sidsen/redis,kolonse/redis,hanmichael/redis,ScottKaiGu/redis,shanegxxiao/redis,Cybermaxs/redis,adamweixuan/redis,jqk6/redis,erwin00776/redis-2.8-optimize,jaambee/redis,hanmichael/redis,jqk6/redis,Cybermaxs/redis,erwin00776/redis-2.8-optimize,laurencee/redis,laurencee/redis,shanegxxiao/redis,alpha8/redis,hanmichael/redis,liqiang199105/redis,upsoft/redis,shanegxxiao/redis,janeasystems/redis,ideaar/redis,ideaar/redis,quangnguyen90/redis,erwin00776/redis-2.8-optimize,damy/redis,liqiang199105/redis,janeasystems/redis,kts12345/redis,jqk6/redis,jacklee0810/redis,sidsen/redis,sidsen/redis,enginekit/redis,quangnguyen90/redis,LittlePeng/redis,enginekit/redis,alpha8/redis